短语词组短语load guy line 负荷绷绳load -line draft 载重水线吃水light load water line 轻载水线pump load sense line 泵液压负载检测管路load sharing line 负荷分配线路Mark load -line 载重线dead load thrust line 恒载压力线dead load compression line 恒载压力线 返回 load line